Effect of Treflan Herbicide and Row Distances on Yield and Quality of Sesame Sesamum Indicum L.

Abstract

A field experiment was conducted during the summer season of 2022 in one of the fields of the Tawi area, belonging to the city of Ramadi in Anbar Governorate, Iraq, located at longitude 43° east and latitude 38° north, in silty clay soil, to determine the effect of different concentrations of Trifluralin herbicide and distances between rows on some yield and quality traits of sesame crop. The experiment used a completely randomized block design (RCBD) with split-plot arrangement and three replicates, where the main plots occupied three distances between rows, namely 40, 50, and 60 cm. The sub-plots included five treatments, namely the recommended concentration of Treflan spraying (1.4 L ha−1), half the recommended concentration, 1.2 L ha−1, as well as two control treatments (weedy check and weed-free). The results showed a clear effect of the different weed control treatments on most of the studied traits. Treatment W2, spraying the herbicide at the recommended concentration, achieved the lowest ratio dry weight of weeds, which reached 120 g m−2, thus increasing the inhibition rate to 59.7%.